I AM MORE INTERESTED IN HEALTHSPAN than lifespan. I wouldn’t like to live too long with severe dementia. Today’s essay explores eight healthy habits that might add decades to your life.

Respiratory failure is a condition in which your blood doesn't have enough oxygen or has too much carbon dioxide. Sometimes you can have both problems.

Yesterday marked the 36th year that the world observed World No Tobacco Day. This relatively obscure milestone masks a stalled effort to curb consumption of combustible cigarettes and other nicotine-related products. It’s unlikely most people paid any attention. But the impact of smoking is all around us, even if we don’t see it. Statistics rarely tell a provocative story to compel people to action.

Vaping may not contribute to lung cancer the way cigarettes do, but there are still dangers in that “smoke.”